Improvement in locomotive smoke-stacks



Patented May 14,1878.

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IMPROVEMENT IN LOCOMOTIVE SMOKE-STACKS.

' Specification forming part of Letters Patent No. 203,592, (lated May 14, 1878 5 application filed February 25, 1878.

Fig. 3 is a horizontal section of the stackbody, taken through the line y y, Fig. 1. Fig. 4' is a horizontal section of the stack-body and shell, taken through the line z z, Fig. l.

Similar letters of reference indicate cor-re sponding parts. x

The object of this invention is to furnish locomotive smoke-stacks which shall be so constructed that they will not choke the draft, and at the same time will arrest the sparks and prevent any danger from fire, and which' shall be simple in construction, may be applied to any smoke-box, and will be very economical 1n use.

A represents the saddle, which is attached to the smoke-box of the boiler,- and to which is bolted a cast-iron ring, B. To the ring B is riveted the lower end of the stack-body C. To the stack-body C, a little above the ring ""B, is secured the lower end of the shell D, the

lower part of which is made in the form of an inverted cone. The upperl part of the shell D is made in the form of an upright band, surmounted by a tapering band.

'The upper ends of the stack-body C and the shell D are about upon a level, and to the upper end of the Asaid stack-body C are attached the lower ends of a number of bolts, E, the upper ends of which are attached to the cone F, so as to support the said cone above the upper ends of the stack-body C and the shell D.

The edge of the cone F is curved downward, and to it is attached the upper edge of the return-cylinder G, which projects downward around the upper part of the stack-body C, and its lower part is flared outward or made bellshaped. The upper part of the stack-body C thus serves as a circulating-plate to separate the upward and return currents.

The return-cylinder G passes down through a hole in the center of the wire-gauze or netting H, which is secured to it and to the shellV D by a frame-work or spider.

In the sides of the stack-body G, .a little below the lower end of the return-cylinder G, are formed a number of oblong holes, c, to prevent the draft from choking.

In the lower part of the stack-body G is formed a spark and cinder pipe, I, the upper end of which opens into thelower part of the space between the said stack-body G and the shell D, and its lower end projects downward below the saddle A, so as to enter the smokeboX and be below the upper end of the petticoat-pipe.

With this construction the sparks and cinders are carried up with and by the smoke and exhaust-steam through the stack-body C, strike against the cone F, and pass down through the space between the upper part of vthe said stack-body (l and the return-cylinder G into the space between the stack-body G and the shell D, whence the light, ne, dead sparks pass out through the netting H. The large and heavy sparks and cinders drop through the space between the stack-body G and the shell D into thev lower part of the said space, and pass through the pipe I into the smoke-box, where they come into the influence of the draft, and are again carried up through the stack-body C, and so on until they are beaten to powder and are carried out through the netting H.

By this construction, and the bell-shaped lower end of the return-cylinder Gr, the draft is softened, so that it will not cut the netting, and at the same time the draft will be so little obstructed or choked that the boiler will make steam to its full capacity.

My return-cylinder, with bell-shaped mouth at bottom, makes a large circumference at bot-v tom, where the whole exhaust is distributed, the netting being thus made to last as long as any other part of stack.

My spark and cinder pipe has no holes through the stack-saddle, but a halfround sleeve fastened on the inside of stack-body, that runs only up to the body ofthe relief-openings. lhe remainder of pipe, with the reliefopenings inside, merely operates 4as a circulating-plate to separate the up and down currents, 'which make the stack Work successfully.

What I claim as new, and constituting my invention, is-

1. The combination of the body C, provided with holes c', cone D, pipe I, ring B, and saddle A, all constructed and arranged as shown and described. 

